5-30 Starting motor reassembly and installation
Refer to Figure 5-9 and reassemble starter end cover and brush holder in reverse of disassembly
sequence (para 5-28).
Refer to Figure 5-9 and reassemble remaining components of starter assembly in reverse of
disassembly sequence (para 5-28).
Install and saturate new wicks with engine oil.
Apply sealer to expansion plugs and holes.
If sleeve bearings were removed, press new bearings into housings.
If field windings were removed, coat threads of pole shoe screws with a suitable thread sealer before
installation. Varnish inside of frame and field windings. Leave 0.38 inch from each end of frame free of varnish.
Adjust drive clutch as follows:
(a) Remove plug.
(b) With starter pinion in engaged position, press clutch assembly inward toward lever to take up slack.
(c) Adjust hex nut until clearance between outer face of clutch pinion and inner face of drive housing is
23/64 inch, + 1/32 inch.
Section IX. Fuel Injectors
The fuel injector (Figure 5-10) is a lightweight compact unit which enables quick easy starting directly on
diesel fuel and permits use of a simple open type combustion chamber. The simplicity of design and operation provides
for simplified controls and easy adjustment.
The fuel injector performs four functions:
Creates high fuel pressure required for efficient operation.
Meters and injects fuel to exact amount required to handle load.
Atomizes fuel for mixing with air in the combustion chamber.
Permits continuous fuel flow.
Combustion required for satisfactory engine operation is obtained by injecting a small quantity of accurately
metered and finely atomized fuel oil into the cylinder under pressure.
Metering of fuel is accomplished by an upper and lower helix machined in lower end of injector plunger.
The continuous fuel flow through injector prevents air pockets in the fuel system, and serves as a coolant for
those injector parts subjected to high combustion temperatures.